盘式永磁同步电机的水力换热研究  

Study on Hydraulic Heat Transfer of Axial Flux Permanent Magnet Synchronous Machine

作　　者：郑乐梅 孙浩杰 陈志彬 ZHENG Lemei;SUN Haojie;CHEN Zhibin(Xiamen Tungsten Co.,Ltd.,Xiamen 361000,China)

机构地区：[1]厦门钨业股份有限公司,厦门361000

出　　处：《微特电机》2025年第2期32-36,44,共6页Small & Special Electrical Machines

摘　　要：水冷已成为盘式永磁同步电机的主要散热方式,但流道设计与功率匹配直接影响电机效率,其水力换热机理尚不明确。针对中小功率盘式永磁同步电机提出了一种低成本的端面冲刷冷却设计。通过构建三维流固耦合换热模型,并搭建实验平台,系统分析了电机温度场分布及流道的水力-换热性能。研究结果表明,仿真结果与实验结果误差在5%以内,验证了设计的有效性。端面冷却流道在中小功率电机中表现出良好的散热性能。以7.5 kW电机为例,冷却水流量为1.0 L/min时,绕组温升控制在60 K以内。随着雷诺数增加,电机温升逐渐趋于稳定。综合考虑流道压降与换热性能,冷却水流量存在最佳点,研究的电机最佳冷却流量为3.0 L/min,能够在确保良好散热效果的同时保持较低的压降损耗。Water cooling has become the main heat dissipation method of axial flux permanent magnet synchronous machine,but the flow channel design and power matching directly affect the efficiency of the motor,A low-cost end-face scour cooling design for small and medium power axial flux permanent magnet synchronous machine was presented.A three-dimensional fluid-structure coupled heat transfer model was established and an experimental platform was set up to analyze the temperature distribution of the motor and the hydraulic-heat transfer performance of the runner.The results show that the error between simulation results and experimental results was less than 5%,which verifies the effectiveness of the design.The end cooling runner has good heat dissipation performance in small and medium power motors.Taking 7.5 kW motor as an example,when the cooling water flow rate is 1.0 L/min,the winding temperature rise is controlled within 60 K.As the Re increases,the temperature rise of the motor gradually stabilizes.Considering the pressure drop and heat transfer performance,there is an optimum cooling water flow rate.The optimum cooling flow rate of the motor is 3.0 L/min,which can ensure good heat dissipation while keeping a lower pressure drop loss.

关 键 词：盘式永磁同步电机 冷却水流量 温度场 实验验证 数值模拟 

分 类 号：TM351[电气工程—电机]